HP today announced the HP Slate8 Pro and HP Slate7 Extreme powered by NVIDIA Tegra 4 processor. They follow hard on the heels of HP's news this summer of its first two other Tegra 4 devices - the HP SlateBook x2 hybrid that features a 10.1" 1080p full HD screen, and the HP Slate 21 AIO all-in-one with a 1920 by 1080 pixel display. Here's more info: